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Updated: Jul 9, 2026
06:15
Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
Published on: August 9, 2024
Squamous cell carcinoma arising from an epidermal cyst
1Department of Orthopaedics and Traumatology, Caritas Medical Centre, Shamshuipo, Hong Kong. brianmychiu@yahoo.com
Hong Kong Medical Journal = Xianggang Yi Xue Za Zhi
|December 7, 2007
Summary
Malignant transformation of an epidermal cyst into squamous cell carcinoma is rare. This case report details a 74-year-old man with squamous cell carcinoma arising from a proximal thigh epidermal cyst, successfully treated with wide excision.
Area of Science:
- Dermatology
- Oncology
- Pathology
Background:
- Epidermal cysts are common benign skin neoplasms.
- Malignant transformation of epidermal cysts into squamous cell carcinoma is infrequently reported in medical literature.
Observation:
- A 74-year-old male presented with a rapidly enlarging epidermal cyst on his proximal left thigh.
- The lesion exhibited discharge and imaging suggestive of malignancy.
- Intraoperative frozen section indicated suspected malignant change within the epidermal cyst.
Findings:
- Histological examination confirmed squamous cell carcinoma arising from the epidermal cyst.
- The patient underwent wide excision with adequate resection margins.
- Postoperative imaging revealed no evidence of metastases, and no recurrence was observed at 2-year follow-up.
Implications:
- This case highlights the importance of considering malignant transformation in growing epidermal cysts.
- Early diagnosis and surgical management are crucial for favorable outcomes.
- Further research into risk factors and diagnostic markers for this rare transformation is warranted.
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